Transcript for Americans Fighting Deadly Ebola Virus Coming Home to the US

We begin with the breaking news about those Americans fighting the deadly ebola virus. ABC news has learned that the two American missionaries stricken with the disease are being medevaced home. As we come on the air a hospital in Georgia announced it's making preparations to receive its first patient. How would a patient be flown here safely and how would an American hospital protect its team from an outbreak here at home. ABC's chief medical editor Dr. Richard decemberbesser takes us inside the details. Reporter: One of them, Dr. Kent Brantly, the Christian organization he works for saying his condition is getting worse. He's fighting for his life. It's a very difficult day for him. He's a man of deep faith. He needs our prayer. Reporter: Brantly would be flown in a specialized isolation pod like this, an airtight tent, completely disposable, transported in a small plane with a small crew. ABC has learned the first patient will be transferred to Georgia which has prepared a special isolation unit. Today Dr. Brantly choosing to forego an experimental serum, giving the only dose available to his infected college, Nancy writebol. Liberia, closing schools, Sierra Leone, activating security forces. The CDC now expanding to 50 experts in the region. I'm very concerned. This is going to take an intensive, long effort. This is a marathon, not a sprint. Reporter: Around the world, mounting jitters over air travel. There are direct flights from the impact zone to more than 30 countries. In China special airport scanners check the temperatures of arriving passengers. In this airport anyone with a temperature exceeding 99.5 degrees gets a blood test. Here in the United States, immigration officers scan faces for signs of illness. Incoming pilots required to report passengers who appear ill to CDC quarantine stations in 20 ports of entry. This may be the first place the CDC takes someone they're worried about it. They put them if in this room with this bed, close the door and keep them in isolation. This is our go bag. We take this to our response. Reporter: Trained medical officers prepared to rush to any passenger exhibiting signs of illness. Without even touching me you got a temperature? That's correct. Reporter: The CDC saying Americans should feel safe. I'm confident that we're not going to have wild spread ebola in the U.S. We need to make sure if someone arrives in the country and has symptoms, their doctor thinks of ebola, isolates them and gets the test which we do here at CDC. Tell me more about how hospitals will protect their teams. This unit at emery has been working with the CDC. The people have been training on how do you wear these suits and give the care in an isolation room. You wouldn't want to put someone in there that didn't have that training. The community in Atlanta should have no fear about this patient in their hospital. They have really studied this. Richard Besser once again on the story tonight. Thank you.

This transcript has been automatically generated and may not be 100% accurate.

{"id":24799354,"title":"Americans Fighting Deadly Ebola Virus Coming Home to the US","duration":"3:12","description":"Worldwide precautions being taken to prevent the spread of the deadly virus.","section":"WNT","mediaType":"Default"}